Albert Barnes Commentary Revelation 21:25

"And the gates thereof shall in no wise be shut by day (for there shall be no night there):" — Revelation 21:25 (ASV)

And the gates of it shall not be shut at all by day. The city will be constantly open, allowing free ingress and egress to all who reside there. The language is derived from Isaiah 60:11. See Barnes on Isaiah 60:11.

Applied to the future state of the blessed, it would seem to mean that while this will be their permanent abode, yet the dwellers there will not be prisoners. The universe will be open to them. They will be permitted to go forth and visit every world, and survey the works of God in all parts of his dominions.

For there shall be no night there. It will be all day; all unclouded splendor. When, therefore, it is said that the gates will not be “shut by day,” it means that they will never be shut. When it is said that there will be no night there, it undoubtedly means that there will be no literal darkness, and nothing of which night is the emblem: no calamity, no sorrow, no bereavement, no darkened windows on account of the loss of friends and kindred. Compare Barnes on Revelation 21:4.